Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A change-under-load transmission having an input shaft and an output shaft; a pair of gearwheels on each of said input and output shafts; two pairs of coaxial shafts, said pairs of coaxial shafts being aligned axially with one another; a friction coupling element at the end of each of said coaxial shafts adjacent the other pair of coaxial shafts, said coupling element having a coupling face, and a gearwheel at the other end of each of said coaxial shafts, said gearwheels being adapted to be in permanent mesh with an associated one of said gearwheels on said input or output shaft respectively; and a central friction coupling element disposed between the adjacent ends of said two pairs of coaxial shafts, said central coupling element being adapted to be freely slidable axially with respect to said pairs of coaxial shafts; correspondingly positioned ones from said pairs of coaxial shafts being slidable axially inwards independently of one another out of a rest position, and the other shaft of each of said coaxial pairs being axially immovable; and said coupling faces of said coupling elements on said slidable shafts being disposed nearer said central coupling element than said coupling faces of said coupling elements on said axially immovable shafts.
Claim 2
Dependent Claim
206 words
A change-under-load transmission having an input shaft and an output shaft; a pair of gearwheels on each of said input and output shafts; two pairs of coaxial shafts, said pairs of coaxial shafts being aligned axially with one another; a friction coupling element at the end of each of said coaxial shafts adjacent the other pair of coaxial shafts, said coupling element having a coupling face, and a gearwheel at the other end of each of said coaxial shafts, said gearwheels being adapted to be in permanent mesh with an associated one of said gearwheels on said input or output shaft respectively; and a central friction coupling element disposed between the adjacent ends of said two pairs of coaxial shafts, said central coupling element being adapted to be freely slidable axially with respect to said pairs of coaxial shafts; correspondingly positioned ones from said pairs of coaxial shafts being slidable axially inwards independently of one another out of a rest position, and the other shaft of each of said coaxial pairs being axially immovable; and said coupling faces of said coupling elements on said slidable shafts being disposed nearer said central coupling element than said coupling faces of said coupling elements on said axially immovable shafts.
Claim 3
Dependent Claim
53 words
A transmission according to claim 1, further comprising spring means biassing said axially slidable shafts into said rest position, said rest position corresponding to the neutral position of said transmission, and fluid pressure cylinder means operable to cause each of said shafts to be movable in the direction towards said central coupling element.
Claim 4
Dependent Claim
36 words
A transmission according to claim 1, further comprising means axially journalling said central coupling element in bores in said inner ones of said coaxial pairs of shafts, whereby said central coupling element is freely slidably supported.
Claim 5
Dependent Claim
27 words
A transmission according to claim 1, further comprising ball bearing means supporting the outer ends of each of said inner ones of said coaxial pairs of shafts.
Claim 6
Dependent Claim
42 words
A transmission according to claim 1, wherein said axially immovable shafts comprise the inner ones of said coaxial pairs, and further comprising reversing gearwheel means for coupling one of said inner shafts to an associated gearwheel on said input or output shaft.
Claim 7
Dependent Claim
57 words
A transmission assembly comprising a pair of transmission assemblies according to claim 1, wherein, in one of the transmissions, said axially immovable shafts comprise the inner ones of said coaxial pairs, and said one transmission further comprising reversing gearwheel means for coupling one of said inner shafts to an associated gearwheel on said input or output shaft.